1, Buchner
(from Wibmer), effects of 6 to 12 grains of the resin of the root; 2,
Rossig, Monograph on Convolvulaceæ, 1875, effects of 1 gramme of the resinoid convolvulin,
taken in the morning fasting; 3, Husemann,
Pflanzenstoffe, Hagentorne, effects of pure convolvulin.